What is the meaning of the red range on the airspeed indicator?

Question

Question Quiz SPL - Sailplane Pilot License - Aircraft General Knowledge

QuizVDS · Accepted Answer

Speed which must not be exceeded regardless of circumstances

QuizVDS · Answer

Speed which must not be exceeded within bumpy air

QuizVDS · Answer

Speed which must not be exceeded with flaps extended

QuizVDS · Answer

Speed which must not be exceeded in turns with more than 45° bank

Id 106 - SPL - What is the meaning of the red range on the airspeed indicator?